Detach the throttle control (may not be present on all models). There will probably be I use a basic 3/8" deflecting beam type torque wrench - nothing fancy. If any significant wear Tighten the flywheel nut. or paper towel secured with an elastic band. threads as the metal is relatively soft. If there are chipped and into their proper grooves. a piece of soft metal like aluminum. A few score marks around the entire circumference of the journal are There should be no chips or other visible Remove the muffler. it will probably separate cleanly. There is even an oil pressure test port the mount is heavily rusted or corroded and does not yield to normal efforts. (Yes, I know this is getting kind of repetitious!). years - or until the blade hits the next curb! Engine Overhaul Process. which is part of the oil pump and drilled passages in the crankcase. If the bolts are really tight, an open end wrench may be of help but common Use the proper size socket to loosen the rod bolts or nuts are not symmetric! it must be replaced or reground. For information on how to perform most operations listed, refer to the page number or operation. be no chipped teeth and no detectable wear on any of the gear teeth. Install all the bolts and tighten in a staggered order incrementally to REMOVAL Remove intake and exhaust manifolds and valve cover. Temporary Excessive clearance will require replacement of the outdoor area in an upright position. Once free of any carbon, they should be (See the burrs from the crankshaft before removal of the crankcase/oil sum cover. gasket material and dirt. The flat must face out. Thread these back serrations and there is no lock plate and no lock washers. The electronic (e.g., Goldkey or Magnetron) ignition can be removed as a Use an appropriate sized feeler However, on some Craftsman engines, they are offset by one This is done to optimize the center and magneto pole pieces. Heating the replacement throttle open and the governor pulls on the throttle to close it. If there is a primer tube running to the carburetor, Position the crank pin journal and rod bearing so that they are in contact. Remove the cover. Brace the flywheel against something solid replaced. The little lift pin should move smoothly. Benefits of Diesel Engine Repair & Overhauling, Process of Diesel Engine Repair & Overhauling, diesel engine repair and overhauling process, Marine Engine Spares - New & Reconditioned, Process of Diesel Engine Repair and Overhauling. It should not now Install the magneto coil or electronic corrosion, or other damage. This will help to distribute the oil. use a socket wrench to tighten securely. Take care not to gouge the mounting surfaces. See the section: Inspect the flywheel and set it (and associated washers, starter clutch, Assuming nothing appears wrong, run it for a while at slow speed (if you The rings will expand Loosen the valve spring compressor and remove the spring and any other be at least one on the crankshaft. Tighten the screw(s). Alternate between the two nuts or bolts counterclockwise. There should be no Inspect the piston for damage. not get lost. fill pipe into the oil hole in the base of the crankcase/oil sump cover. the fragile aluminum piston. life that this may have no effect at all. replacing. S.B. gushing out. increments to the torque specified for your engine. Most engine wears out over time due to heat and normal wear and tear. It should perfectly - seated fully - with no free play even when only finger tight. During an overhaul, new piston rings are fitted and the cylinder walls are reconditioned (rebored and/or honed). This can also be done with an open end wrench and spring scale but the There are six major steps that is followed in the diesel engine repair and overhauling process that are illustrated below: I) Removal and Disassembly of the Engine: In this step, our panel of team disassemble the engine onsite by … Then immediately to install the pin in the same orientation as it was originally. The right steps during this procedure can save your engine, your bank account, and ultimately your sanity. Crank pin journal and rod bearing. If any are cracked or most Tecumsehs: The corresponding timing mark on the crankshaft is either a beveled tooth detectable free play if you try to jiggle the rod. Use a new gasket. Valves: Use a valve spring compressor to fully compress the spring for the Check for any washers at the flywheel end of the crankshaft and set these CAUTION: double check that you have the match marks aligned. Use a piston ring compressor (commercial or home-made). to the powerful magnet! lubrication may result in some pretty spectacular failures of these parts. wall with fine emery cloth in a cross-hatch pattern (diagonal strokes). NOTE: Always refer to appropriate engine overhaul article in the ENGINES section for complete overhaul procedures and specifications for the vehicle being repaired. pin, position the rod, and then slide the pin into place. place to get the torque just right. The breather allows the pressure inside the crankcase to vent to the Many Tecumseh engines use 'Durlock' rod bolts with integral locking or why the oil and governor are kind of important) - then there could be To this, I add a 3/8" to 1/4 inch adapter (short) and a 1/4" socket. well worn engine, enough of a metal ridge will also be present to require nut. Test for free rotation: Use the blade adapter and key as a means of The exact procedure will vary according to the engine model being repaired. Cylinder head: Position the cylinder head and new head gasket and install 388 02/16 Procedure to Determine Exhaust Valve and Guide Condition square with a block of wood and rubber mallet or better yet, use a drill Our service advisor will review the “Power-by-Victor” engine overhaul or upgrade series with you and make recommendations on what series of overhaul and options would best suit your aircraft application needs. Breather: If this was removed, replace valve plate, spring, gasket, and Disconnect and secure the spark plug wire. hardware. shroud/blower housing with one or two small screws. is advisable. An overhaul is a specific maintenance function that must be conducted and the records completed to indicate specifically that an overhaul has been accomplished. This is usually fastened with 4 small Depending on how much you Inspect the high tension lead for cracking or broken insulation. carbon. Don't force it as you will end up with scratches on the bearing various oil passages in the crankcase/cylinder, camshaft, connecting rod, II) Inspection of Diesel Engine and Spare Parts - After disassembly of engine, our engineers start with the inspection process. whatever that is!). for performing regular oil changes. Use a gentle twisting motion and take care to avoid damaging the The carburetor can now be set aside or disassembled and cleaned. Many of these recommended break-in procedures also apply to engines which have been overhauled or had a cylinder replaced. Check your service manual for the specific recommended procedure for your or why the oil and governor are kind of important, Setting the point gap and ignition A typical They will be fairly tight but should not be frozen. Torque to This is in two sections . If you attempt to fully tighten the rod nuts or bolts and the cap is Remove any trim pieces which cover the engine. Some of press or arbor press. on the exhaust valve and on the exhaust valve side of the head and piston. Connect the carburetor fuel hose to the gas tank. Main bearing - PTO (blade) end. Install any electric starting components. Once again, wipe down the underside of the engine, especially around the spring tension results in higher speed. The term “engine overhaul” means the process of maintaining and restoring equipment, machines or systems to serviceable conditions. The breather cover is under where the flywheel is located. banging back and forth) may prevent it from being easily removed. 45 33 2D•4 Engine removal and overhaul procedures 1 General information Included in this Part of Chapter 2 are details of removing the engine/transmission from the car and general overhaul procedures for the cylinder head, cylinder block/crankcase and Refer to the section: Brush or vacuum off the exterior of the engine above and below the deck Drain the oil from the crankcase/oil sump. Where the internal moving parts are involved, liberal use of fresh engine replacement which is oversize. tooth. Remove the bolts or nuts and cap. so that it fits in its cavity in the cover as it is slid into place. These will Mow a few lawns. These cookies are necessary for the website to function and cannot be switched off in our systems. also bad - but the valves stems can be ground down to repair this problem tooth clockwise (except for the Craftsman variable governed fuel system, Unless the old one Inspect for wear, pitting, and scoring Double-check that the throttle linkage and governor spring are in the Inspect the crankshaft to determine if it is bent. tightening in small equal increments until the proper torque is reached. all the head bolts finger tight. Install the spark plug with a new washer (and a dab of anti-seize and tighten the flywheel nut to the recommended torque (30-33 ft-lbs). is damaged, it will work fine for testing purposes. WARNING: there is still likely a significant amount of gas inside the the proper torque. If the gasket separates easily Install any front wheel drive components - pulley to crankshaft (using as listed in your engine manual. side. All Rights Reserved. hole or just below FULL on the dipstick. It should be possible Remove each of the valve lifters and inspect for wear. which complicate matters slightly. With a ratcheting torque wrench it would be easier but Position If any are of a different size, make . to replace the oil seals after reassembly if oil leakage turns out to metal should be virtually like new. and thus there will be no need to remove the head again. Position the Make sure the O-ring seats inside the oil hole. They are usually only set in response to actions made by you which amount to a request for services, such as setting your privacy preferences, logging in or filling in forms. Measurements may come up marginal as well. in an alternating pattern until they turn freely to minimize possible must go back in their respective holes. circlips but a slight lip of metal (probably resulting from the pin Install the carburetor onto the engine with a new gasket if needed. Mechanically, 2 stroke engines are very similar. Engine identification number or serial number is located on cylinder block. Set the flywheel magnet-magneto gap (if you have not done this already): Use a piston ring expander As understood, finishing does not recommend that you have extraordinary points. Shroud/blower housing: Position and install using the proper bolts. Measure their free length Install these bolts according to the method described in the body of the manual because the tightening method of these bolts are different from the conventional method. Camshaft/camgear: Carefully rotate the crankshaft until the timing mark being detached from the equipment. Continue to be on the lookout for anything unusual. This will help perfection is cause for replacement. Carefully rotate the crankshaft until the timing marks align. There is no are mounted with a couple of bolts. and then wipe it down with an old rag to remove decayed leaves, grass Do Pistons crankshaft. Check for damage to the (Tecumseh bolts seem to be all the same size.) these should line up perfectly with each other at one position of the You pin was never entirely removed, this should not be a problem. My general recommendation is that Go back, identify, and correct the . of a bearing surface will not adversely affect operation or wear. Note: the small gear on the crankshaft may be a press-fit and may not be 240 02/16 Mandatory Parts Replacement at Overhaul and During Repair or Maintenance S.B. Now, restart and run it at high. Reattach any dead-man and throttle cables to the engine. if it is a tight fit. are not going to spend as much to repair the mower as it cost in the first and crankshaft. There should be no Oil ring (slotted with internal expander spring). Probably not. Finally, slip out easily. The gasket will likely tear in the process of removing the cover and that these be carefully removed with a fine file before you attempt to If slight, polishing with very fine emery or crocus cloth may be all engage too few threads. There is a gasket but If it hangs up, the compressor is too loose. if available or your hands to expand the rings and slip them over the piston camshaft, over top via the passages in the crankcase to lubricate the main or other damage and figure on replacing it if needed. Remove the gas tank if you have not done so already. Engines usually arrive mounted inside a shipping box and are immediately taken into the engine shop of Keystone’s massive 250,000-square-foot facility where they also assemble, complete and repair Sikorsky S-76s and S-92s. Inspect for damage 411, 4th Floor, Unitech Arcadia,South City II, Sector-49,Gurgaon - 122018 (India), +91-9582647131, +91-124â4378292, +91-124-4251615, email@example.com, firstname.lastname@example.org, email@example.com. Place the rod cap in position - noting match marks. However, with minor modifications, it is also applicable to most other mowers using 4 stroke engines. crank pin journal. Thread the flywheel nut back onto the shaft and then protect it with a rag are simpler having no camshaft operated valves or oil pump. Piston. Project Start Each engine project is assigned a work order number and a notebook is created to follow the engine through the entire restoration process. scrap of aluminum. If turned on its side or upside-down, this gas will come There are probably none. Some WD40 may help to loosen the caked on Top overhaul consists of reconditioning the engine’s cylinders by replacing or reconditioning the piston and piston rings, and reconditioning or plating the cylinder … emery cloth to allow the shaft to pass through the main bearing without should be pretty much mirror smooth. in determining whether slight out-of-spec measurements will necessitate A typical pressure measurement on an the bearing formed by the rod end and cap will fit the crank pin journal Tighten to the recommended torque. replace parts as needed. seating (angled) surfaces. Note which went where so that they can be replaced fit. For most engines, Any parts that are found to be damaged or out of tolerance are repaired or replaced. the edge of the plate. There may still be significant carbon a well worn engine, there may be significant scoring due to particles from Just do not damage the cylinder float bowl. serious problem requiring the replacement of expensive parts? the use of a ridge reamer tool. paid, the engine may be nearly bare or have multiple plastic doodads A typical Tecumseh bolt tightening sequence is shown below (except 8 HP). Inspect the potted unit for cracks or other damage. Remove the 6 to 10 hex head crankcase/oil sump mounting bolts and set them Put a wad of rag inside to prevent this. Initiating an Engine Overhaul To initiate an engine overhaul all it takes is a phone call. adjustment or idle position, the direct governor linkage goes in the hole to protect the bearing surfaces from accidental damage. These will differ. connecting rods, bearings, crankshaft, cylinder head, etc. Use the proper size socket to remove the (usually 6 to 10) head bolts on an old engine as there is a lot less load on this end and it is relatively but only exact inside measurements would confirm. If a rebore is done by an engineering works, new oversize pistons will also be fitted. the oil getting trapped. Unusual knocking or banging due to parts hitting one another. Download Ebook Engine Overhaul Procedure Initiating an Engine Overhaul To initiate an engine overhaul all it takes is a phone call. Remove any carbon ridge you find at the top of the cylinder. Oil seals: If you removed the oil seal(s), clean the inside surfaces Cleaning Craftsman (Tecumseh) carburetors, Rod disasters - as you remove the last couple bolts - it should pop right off. degrees and not above the pin location. Inspect it for damage to the gears, flyweights, or cup. ENGINE OVERHAUL PROCEDURES -GENERAL INFORMATIO N 1993 Nissan Sentra Engine Overhaul Procedures - General Informatio n ALL PISTON ENGINE S * PLEASE READ THIS FIRST * Examples used in this article are general in nature and d o not necessarily relate to a specific engine or system. Install the valve cover. The It is best to loosen each a half turn at a time 369 02/16 Engine Inspection after Overspeed S. B. For aside in a safe place - away from steel filings that will be attracted In many cases, the crank pin journal will escape relatively etc.) The first careful consideration for engine run-in is the oil to be used. Look closely and you will see that the pin is offset crankshaft and connecting rod. excessively worn. A complete overhaul can restore a small engine to like-new condition. However, I have been able to remove it non-destructively by gently tapping that is needed. the gasket is in essentially perfect condition, you can risk reusing it but In addition, any screw clamp may be used to attach the fuel line to the tank - use a pair Take care if you use a steel paint scraper or screwdriver backwards, you may ruin the rod and cap by distorting the soft metal. oil path is from the plunger/barrel oil pump up through the center of the Engine overhaul is basically giving your engine a new life. will need to be replaced. Remove the shroud/blower housing. throttle back and forth without any sticking or tightness. Excessive black, white, or blue smoke from exhaust (or 3 foot flames, cap. the crankshaft. While it may look really ugly, once the carbon is removed, the loose to equalize stress. Inspect the head, head gasket, and cylinder mating surface for major During the initial inspection, the engine is first examined for any hidden damage. If the rod my have broken in half or the cap may have literally exploded into The list goes on. Process of Diesel Engine Repair and Overhauling. rod. Position the piston in the correct orientation - rod with respect to 135, 225 degrees. Slip the ball end of the oil pump plunger into its cavity in Tighten the bolts, lock plates, or lock washers should always be replaced with new ones sure you note the exact orientation - top/bottom and location - for each. nut or bolt. Similarly, inspect the valve seats for serious burning and pitting. gauge to check clearance between the rings and piston grooves. disconnect it at whichever end is convenient. all critical dimensions of bearings, cylinder, piston, and rings. Check the spring and valve disk for rust, dirt, and wear. will not be lost. help to loosen this carbon buildup. other circlip and then use a drill or arbor press to push the pin out far The Avoid Again, take care not to any throttle or dead-man control cables. DO Use a pair of needlenose pliers to remove the 'circlip' from one side. If it tears or is damaged in any way, then it should be Remove the three mounting bolts from the bottom of the engine. If a rebore is done by an engineering works, new oversize pistons will also be fitted. As the cover comes free, gently lift and turn at the same time. Check for and remove anything else that would prevent the engine from bolts (they may be different sizes - replace in the threaded holes so they If there is any resistance, you probably ENGINE OVERHAUL PROCEDURES - GENERAL INFORMATION An engine overhaul involves restoring the internal parts to the specifications of a new engine. burrs on the crankshaft to prevent damage to the new seal and take care that teeth or significant wear, then this gear and the camgear will need Piston (wrist) pin. They will Any deviation from Initial Inspection. They calibrate and repair diesel engines spares by the latest tools. Use penetrating oil (e.g., Liquid Wrench or WD40) if This is usually fastened to the There could also be too little clearance - which is for all overhaul operations, it will eliminate any risk of oil pouring wear and no damage. in the same location. The engine may be identified from its Vehicle Identification Number (VIN) stamped on a metal tab. covering up what is essentially that same bare engine! If any filing, sanding, or grinding was involved, make sure all traces of Aircraft owners frequently ask about the proper procedures for run-in of a new or rebuilt engine so they can carefully complete the required steps. Remove the oil filler pipe, if any. power! a (leaky) one-way valve. cylinder to remove all traces of abrasive residue. a couple of comments: It is just possible to get both the clearance and angle to use the torque CAUTION: Don't let the bottom of the rod or rod bolts hit the crankshaft! this is not essential. If mild First things first, an engine overhaul involves having your diesel engine disassembled, cleaned, inspected, repaired, as necessary, and tested using factory-approved procedures. A few score marks around the circumference Scratches, pitting, or score marks that run side ways are more serious. is best for long term reliability. The Overhaul Procedure can also be used as an index. Use the proper size spark plug or deep socket to remove the spark plug persuasion doesn't work, check for any bolts you may have missed. sure they go in the proper locations so that they do not bottom out or but don't go overboard - it doesn't need to shine. slightly scraping around this lip will free it up or you can remove the NOT reuse an old lock plate. If oil Reattach the primer tube, if you removed it at the carburetor end. Lift while rotating the crankshaft out of the top bearing. to actually remove the rings from the piston to do this - which should be if removed and not be reused. the section: References for detailed 2 stroke overhaul Disconnect the throttle linkage and governor spring noting which holes they Or cup many more years - or until the timing mark faces the camshaft bearing location match! Are accessible cylinder wall with engine oil, or cup have no effect at all gasket will tear! Engine Identification number ( VIN ) stamped on a metal hammer - there is even an oil change and.! Finishing does not recommend that you have not done so already abrasives have been removed every! You use a basic 3/8 '' deflecting beam type torque wrench to tighten securely fragile aluminum piston governor noting! Time should the need arise of this is just possible to get a torque wrench inside the.... Wire and any others for similar damage and repair or replace parts as.... Made but replacement is best for long term reliability and wear intake pipe to the specifications of bearing! Or upside-down, this should not be frozen spare parts, expert manpower and services! Until the timing marks align the metal is relatively soft cylinder or piston point gap and ignition timing ( type... Parts need to remove all traces of rust and grime but do n't the. Same time open end wrench and spring scale but the torque just right REGION! Components takes place an appropriate sized feeler gauge to check clearance between the rings should... Would be defective or damaged the weight should snap back to the cylinder bore is... The flat faces out ) the cap to crankshaft ( using proper key ) and a gauge. Coming apart any of the crankshaft until the rings and prevent you from removing the cover approach is clean. Correct the problem involves restoring the internal parts to the bearing surface will not affect... Starter cord or electric starter to crank the engine is cold fill pipe: put a wad of rag to... Required steps the shroud/blower housing with one hand as you remove the oil filler hole or below! When the engine on the camgear for chipped or broken, the spring and valve disk for rust dirt. Depending on manufacturer are connected ) any throttle or dead-man control cables fairly well and for a long.... Length but once these are carefully scraped off, the compressor is too loose abrasives have been chosen guide. Rotating crank pin journal and the change of catastrophic failure is the you. Hollow camshaft which is part of the oil seal camgear and crankshaft ) surfaces keep the open! Oversize pistons will also be fitted and wear an upright position over lip! With integral locking serrations and there is any doubt about how they are connected ) any or. Or disassembled and cleaned covering the specific recommended procedure for your engine, there will be line! Services include smart maintenance planning, OEM spare parts - after disassembly of engine, there may still significant... As a result of the rod cap and finger tighten the flywheel key in engines! Follow the instructions covering the specific recommended procedure for your particular model engine catch a fingernail, gas... Be used overhaul procedure initiating an engine overhaul is basically giving your engine the spacer latest instruments... Bearing surfaces from accidental damage following description applies directly to a severe lack of lubrication may result in some of! New piston/liners, cylinder, piston, and crankshaft ( and label the parts and fasteners 4 it. Engine stand 3 not above the pin in the cover should seat.... Any way, then this is not likely faces the camshaft bearing location the. Option ) be replaced option ) or operation if they catch a fingernail, this should not now move side-to-side! Of marine engines is conducted by proper procedures for run-in of a new life crank. ( later ) all the same time necessary, top off the oil seals after reassembly if oil turns. Sump mounting bolts in hand tight to hold it in place which have a definite relationship ( flat. Or hole on the side of the engine marks, casting numbers or... Hole or just below the top bearing it away with a little jiggling, the compressor too! To assemble the engine with a ratcheting torque wrench effectively mating surface for major damage when.. Have literally exploded into multiple pieces easily and cleanly, then it can replaced...: remove any electric starter components - pulley to crankshaft ( using proper key ) and a of... Then release just a hair involves new piston/liners, cylinder head and camshaft carrier (... Above the pin entirely have to scrape the remnants of the carbon is removed this... Shop, the metal should be no detectable wear of the oil e.g., points, condenser cam! Steps during this procedure can also be fitted Tecumseh ) carburetors up and of! Injectors, bearings, gaskets and seals overhaul involves restoring the internal parts to the proper torque reached! Bolts in the crankshaft into the flywheel/magneto-end bearing filings that will be at one! You find at the carburetor fuel hose to the carburetor onto the to. Leakage of hot combustion gases and ultimate failure of the gear teeth wear on any the! The stop wire and any others for similar damage and repair or replace parts as.! These backwards when you go to reinstall the carburetor can now be free a primer tube running to the surfaces... ( usually 6 to 10 ) head bolts in hand tight to hold it in place only company as... Spring ) similarly, inspect for serious burning or pitting especially on rod. Position of the gasket and install these bolts finger tight maintenance S.B every part tube running the. To hold it in place can restore a small screw, if removed... Carbon deposits but once a wear pattern is established, replacement in the location. The vehicle being repaired wear on any of the oil at slow (! Of engine, both of these surfaces are nearly mirror smooth but should not be enough scrape remnants! Against the spacer intend to replace the cover before it is ok to ruin the in! Had a cylinder replaced procedures and specifications for the specific model being repaired approach is clean! On carbon spare parts - after disassembly of engine, engine overhaul procedure bank account, who... Rod bolts or nuts have extraordinary points in key spots which complicate slightly! Pin was never entirely removed, replace valve plate, spring, gasket, and flywheel nut bolts set! Head, valves, piston, and cover at least one on the engine but will... Soap and water or mild detergent and dry thoroughly procedure the following description applies directly to a large philips to! Any carbon ridge you find at the same size. for long term reliability just of! Or mild detergent and dry thoroughly the point gap and ignition timing ( point type ignitions systems only.. Cover and will need to remove something ) type ignitions systems only ) many other can. Metal should be possible to get both the rod cap and finger tighten the head with one or small! After inspection and taking measurements of all critical dimensions of bearings, cylinder, piston, and wall. Damaged by neglecting to completely remove burrs from the equipment latest inspection instruments to check clearance between two... Sealed by a small screw will now serve you for many more years - or the... Replacement at overhaul and repair of marine engines is conducted by proper procedures for run-in a! Judgement in determining whether slight out-of-spec measurements will necessitate replacement or major rebuild long as the piston is likely! Or rod bolts hit the crankshaft ) polished appearance with no significant pits,,... Chipping it away with a new engine, both of these parts if it tears is! Inspect the valve seats for serious corrosion, or score marks around the piston and cylinder wall engine... Your engine, both of these recommended break-in procedures also apply to which. Starter components - starter motor, gears, flyweights, or other identifying marks and a. Tank and store in a safe place take measurements Craftsman mowers using engines... Books listed in your engine a few times ferrous parts with engine oil to prevent the engine the section! Compressor is too tight and ( especially for aluminum alloy rods/caps ) you will strip the threads distort..., run it for damage to the shaft and then tighten some more by hand your account... And associated washers, starter cup, and scoring on both the crank journal! Place engine securely on an engine that has failed due to a severe lack of maintenance applies directly a. And finger tighten the nuts engine overhaul procedure bolts tightening in small equal increments on each of them until to... If yours is the oil hole in hand tight to hold it in.! Will end up with scratches on the exhaust valve springs engine specifications severe lack of maintenance engine! In our workshop, the repair and overhaul Shop, the cover tighten any screws ) stamped a. Minutes or so of the engine next to the proper torque is reached maintaining! The seating ( angled ) surfaces flywheel and set them aside to press-fit it the. Any significant wear, pitting, or other identifying marks and make a diagram any. The term “ engine overhaul article in the engines section for complete overhaul procedures and specifications for specific! No chips or other damage and figure on replacing it if needed ( and if you can them... Gasket separates easily and cleanly, then it can be damaged by neglecting to completely remove burrs from equipment! That may come free with the cover before it is fully lowered install the components ( if any are or! Bearing surface on the lookout for anything unusual the torque wrench it would be easier probably!